[PATCH] DVB: Small cleanups and CodeStyle fixes

- Small cleanups:

- make needlessly global functions static

- every file should #include the headers containing the prototypes for it's
  global functions

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>